Thulin LA

The Thulin LA was a Swedish two-seat, single-engine biplane designed by Enoch Thulin in 1917 and made by his company AB Thulinverken in Landskrona. It was based on the earlier Thulin L and E aircraft, with a new engine, fuselage and empennage. The L and E types were in turn based on the German Albatros B.II aircraft, like the NAB Albatros. The Thulin LA was used in Sweden, the Netherlands (10) and Finland (1). This type also made the first passenger transport flights between Sweden and Denmark in 1919. Altogether there were 15 Thulin LAs built.

LA
Role Trainer aircraft
Manufacturer AB Thulinverken
Designer Enoch Thulin
Introduction 1917
Retired 1920
Number built 15

Engine

The engine used was a Thulin G, which was an 11-cylinder 75 kW (100 hp) Le Rhône 11F (bore x stroke 105 mm × 140 mm (4.1 in × 5.5 in)),[nb 1] manufactured under licence by Thulinverken in Sweden. Thulin had journeyed to France in 1915 and acquired the licence to manufacture it from Gnome et Rhône, as well as the Le Rhone 9C, which was sold as the Thulin A.[1] The Thulin-built engine, with a dry weight of 168 kg (370 lb), replaced the much heavier original engine of the Albatros B.II, a Mercedes D.II 89 kW (120 hp) 6-cylinder inline water-cooled engine weighing 240 kg (530 lb).

Use in Finland

The Finnish Air Force (The Whites) received one aircraft as a gift from Sweden from the grocery magnate G. Svensson in the spring of 1918.

The aircraft arrived by ship at Turku on 5 May 1918, where it was used at the Turku Flying School (Turun Lentokoulu), established on 1 May 1918. The flying school was renamed V Flying Detachment (V Lento-osasto) of the Finnish Air Force on 1 October 1918.[2][3] The aircraft was mainly used as a trainer aircraft and was destroyed in a crash due to engine malfunction outside Helsinki's Pohjoissatama harbour in February 1919.

Variants

Thulin also made a floatplane version of the LA, based on the Albatros B.II-W ("Wasserflugzeug").

Operators
 Finland
 Netherlands
 Sweden

Specifications (LA)

Data from [4]

General characteristics

  • Crew: 2
  • Length: 7.8 m (25 ft 7 in)
  • Wingspan: 11.5 m (37 ft 9 in)
  • Height: 3.4 m (11 ft 2 in)
  • Wing area: 36 m2 (390 sq ft)
  • Powerplant: 1 × Thulin G 11-cylinder rotary piston engine, 75 kW (101 hp)

Performance

  • Maximum speed: 120 km/h (75 mph, 65 kn)
gollark: Oh, right, array indexing.
gollark: ```python# parsita-based pseudocode syntax parserfrom stmt import *from parsita import *from parsita.util import constantdef compose(f, g): return lambda x: f(g(x))def map_expr(x): start, end = x if end == "": return start return Op([start, end[1]], end[0])def map_unop_expr(x): return Op(x[1], x[0])def aliases(name, aliases): p = lit(name) for alias in aliases: p |= (lit(alias) > (lambda _: name)) return pclass ExprParser(TextParsers): ε = lit("") IntLit = reg("\-?[0-9]+") > compose(IntLit, int) StrLit = "'" >> reg("[^']*") << "'" > StrLit # TODO escapes (not in "spec" but could be needed) FloatLit = reg("\-?[0-9]+\.[0-9]+") > compose(FloatLit, float) Identifier = reg("[a-zA-Z_]+[a-zA-Z_0-9]*") > Var BracketedExpr = "(" >> Expr << ")" UnaryOperator = lit("NOT") Start = FloatLit | StrLit | IntLit | BracketedExpr | (UnaryOperator & Expr > map_unop_expr) | Identifier # avoid left recursion problems by not doing left recursion # AQA pseudocode does not appear to have a notion of "operator precedence", simplifying parsing logic nicely BinaryOperator = aliases("≤", ["<="]) | aliases("≠", ["!="]) | aliases("≥", [">="]) | lit("DIV") | lit("MOD") | lit("AND") | lit("OR") | reg("[+/*\-=<>]") End = (BinaryOperator & Expr) | ε Expr = (Start & End) > map_exprparse = ExprParser.Expr.parsex = parse("1+2+3 != 6 AND NOT 4 AND x + y")if isinstance(x, Failure): print(x.message)else: print(x.value)```
gollark: <@332271551481118732> Expression parsing is done, I think.
gollark: I wonder if AQA pseudocode *does* have operator precedence. We may need to harvest exam papers.
gollark: This will allow 3% more efficient harnessing of character set anomalies.

References

Notes

  1. The Le Rhône 11F was essentially an enlarged 9-cylinder Le Rhône 9C with two extra cylinders, developing 15 kW (20 hp) more.

Sources

  1. Bellander, Björn. "The museum of Landskrona: The Thulin room".
  2. Keskinen, Kalevi; Kyösti, Partonen; Stenman, Kari (2005). Suomen ilmavoimat I [Finnish Air Force vol. I] 1918 - 1927 (in Finnish). Kari Stenman. ISBN 952-99432-2-9.
  3. "FINNISH Army in 1920s-1930s (organization, equipment)". forum.axishistory.com. Retrieved 15 December 2016.
  4. Stenman, Kari; Kyösti Partonen; Kalevi Keskinen (2005). Suomen Ilmavoimat 1918-1927. Vol. 1 (in Finnish). Espoo. ISBN 952-99432-2-9.
  • Keskinen, Kalevi; Stenman, Kari and Niska, Klaus: Suomen ilmavoimien lentokoneet 1918-1939, Tietoteos, 1976.

See also

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